LEADED TIN BRONZE
The lead content in these bronze alloys is between 7 percent and 15 percent. High leaded tin bronzes alloys are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. Alloy C93200 is considered this family’s workhorse alloy and is widely used in many bearing applications.
LEADED RED BRASS
Leaded red brass alloys are typically found in plumbing applications. The most widely used alloy in this family is C84400 Leaded Red Brass is known for reasonable cost with good machining and casting properties. The lead content ensures pressure tightness. Red brass is also used for low cost bearing materials under low loads.
Manganese bronzes alloys can operate under very high loads and speeds. However, bearing applications require reliable lubrication. Besides excellent mechanical qualities, these alloys have good corrosion resistance. The standard alloy in this group is high tensile C86300, which is comprised of copper, manganese, aluminum and iron.
Aluminum bronze is the highest strength standard copper based alloy. Concast produces C95400, C95500 and C95900 in standard sizes of rounds, tubes and rectangles. Aluminum in conjunction with iron and nickel in C95500 acts as a strengthener in these alloys. All of the aluminum bronzes can be heat treated, further increasing tensile strengths.
Tin bronze alloys are typically found in gear, high strength bushing and bearing applications where high strength and low speeds and heavy loads are present. Other high strength applications for these alloys are pump impellers, piston rings, steam fittings and valve bodies. Tin bronze castings utilized in movable bridge components, turntables for bridges and other structures for fixed and expansion bearings with slow or intermittent movement with heavy loads.
HIGH-LEADED TIN BRONZE
The lead content in these alloys is between 7 percent and 30 percent. High-leaded tin bronzes are free cutting and retain favorable thermal conductivity and good lubricity due to the lead content. The high-leaded tin bronzes are ideal for bearing applications where there could be a loss of the lubrication boundary. These alloys perform excellent in unforgiving environments where foreign matter may be present, such as dirt and other foreign materials. The high-leaded alloys are able to envelope foreign matter due to its malleable nature and in doing so protects the wear surface of mating part such as a shaft.
NICKEL SILVER BRONZE
Nickel silvers are alloys that contain copper, nickel, and zinc. They are also called nickel brasses, the silver refers to their attractive silver shine. The cast nickel silvers are copper, tin, lead, zinc, nickel alloys and are named for their silvery luster. They have low to moderate strength and good corrosion resistance. They are used in the food and beverage handling equipment, decorative hardware, electroplated table ware, optical and photographic equipment and musical instruments. The cast alloys are UNS C97300 to C97800.
PHOSPHER - COPPER - TIN ALLOYS